UCP is WhatIsSol's Unofficial Code Patch, which fixes many bugs in the game and adds a few nice UI features. Since the developers are no longer updating the game, this unofficial patch is the only way we get any updates, and I highly recommend using it. You can get it here: https://www.nexusmods.com/masteroforionconquerthestars/mods/30. Be sure to follow the install instructions since it's not loaded like other mods.